E538 — Calcium Ferrocyanide

Calcium ferrocyanide (E538) is an inorganic compound used as an anti-caking agent in the food industry. It appears as a yellow crystalline powder and is commonly used in salt, salt substitutes, and spices to prevent clumping. 

Danger Level: 0 — Safe

Purpose in Products

In the food industry, calcium ferrocyanide serves several functions:

  • Anti-Caking Agent: It prevents lumps from forming in salt and salt substitutes, ensuring they flow freely. 

Health Considerations

Calcium ferrocyanide is considered safe for consumption when used within established limits. The European Food Safety Authority (EFSA) has evaluated its safety and concluded that it poses no health concerns at the current authorized use and use levels. 

Impact on Children

Calcium ferrocyanide is safe for children when present in food products at the levels typically used in food processing.

Impact on Taste

Calcium ferrocyanide is tasteless and odorless, making it an ideal ingredient for various food products without altering their flavor profiles.

Compatibility with Other Additives

Calcium ferrocyanide is compatible with various other food additives, including sugars and other hydrocolloids. Its water-binding properties make it suitable for use in products requiring moisture retention.

Natural Occurrence

Calcium ferrocyanide is not naturally occurring in foods but is synthetically produced for use as a food additive.

Alternatives and Substitutes

For those seeking alternatives to E538, options include:

  • Sodium Ferrocyanide (E535): Another anti-caking agent used in salt and salt substitutes.
  • Potassium Ferrocyanide (E536): Used similarly as an anti-caking agent in food products.

Regulation

Calcium ferrocyanide is approved for use as a food additive in many countries, including the European Union, where it is designated as E538. Regulatory bodies such as the European Food Safety Authority (EFSA) have evaluated its safety and concluded that it poses no health concerns when used within established limits. 

Conclusion

Calcium ferrocyanide (E538) is a versatile and safe food additive used primarily as an anti-caking agent in salt and salt substitutes. Its unique properties make it valuable in various food products, enhancing texture and stability. While generally safe, individuals with specific sensitivities should exercise caution.